Dark Radiation from a hidden U(1)

Vogel, Hendrik; Redondo, Javier

Contribution to a conference proceedings/Contribution to a book

PUBDB-2016-05939

Dark Radiation from a hidden U(1)

Vogel, H. ; Redondo, J.

2014
Verlag Deutsches Elektronen-Synchrotron Hamburg
ISBN: 978-3-935702-59-1

Vogel, Hendrik "Dark Radiation from a hidden U(1)" in Proceedings, 10th Patras Workshop on Axions, WIMPs and WISPs (AXION-WIMP 2014) / Tsesmelis, Emmanuel, Maroudas, Marios (eds.), Verlag Deutsches Elektronen-Synchrotron : 2014 ; AXION-WIMP 2014 : 10th Patras Workshop on Axions, WIMPs and WISPs, 2014-06-29 - 2014-07-04, Geneva
10th Patras Workshop on Axions, WIMPs and WISPs, AXION-WIMP 2014, Geneva, Switzerland, 29 Jun 2014 - 4 Jul 2014 Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-PROC 196-199 (2014) [10.3204/DESY-PROC-2014-03/vogel_hendrik]

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Please use a persistent id in citations: doi:10.3204/DESY-PROC-2014-03/vogel_hendrik

Abstract: We discuss the impact of a hidden sector consisting of Minicharged Particles (MCPs) and massless hidden photons on the expansion history of our Universe. We present parameter scans for the amount of extra relativistic particles ($N_{\text{eff}}$) and the abundance of light nuclei for fermionic MCPs with masses between $\sim$100 keV and 10 GeV and minicharges in the range $10^{-11}-1$. Current CMB and BBN data significantly constrain the available parameter space of MCPs. The shown results are a valuable indicator for future experimental searches and are presented in a flexible way so that more accurate results on $N_{\rm eff}$ can be easily interpreted.

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